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Identification of modal parameters of a floating system from impulse motion
- Source :
- IndraStra Global.
- Publication Year :
- 2008
-
Abstract
- The modal parameters of a scale-modeled discus-shaped data buoy in heave and pitch are estimated from the experimentally measured impulse response time histories. The use of phase-time, time-frequency domains for derivation of natural frequencies and damping are demonstrated in this paper. The phase-time method is based on the Hilbert transformation, whereas, the time-frequency method is based on the continuous wavelet transformation (CWT) of the measured time histories. In addition, the conventional time and frequency domain method of modal parameter estimation is also adopted for the comparison of results. The details of the model, test procedure, analysis and results are presented in this paper. The modal parameters obtained through CWT are found to be accurate compared to that obtained from the time and frequency domain analysis. � 2008 Elsevier Ltd. All rights reserved.
- Subjects :
- Environmental Engineering
Composite beams and girders
Computer networks
Fluid mechanics
Frequency estimation
Impulse response
Modal analysis
Parameter estimation
Damping
Data buoy
Natural frequency
Phase-time method
Wavelet transformation
Frequency domain analysis
accuracy assessment
damping
data buoy
estimation method
experimental study
floating structure
parameterization
transform
wavelet analysis
Speech recognition
Acoustics
Modal testing
Ocean Engineering
Bilinear time–frequency distribution
Impulse (physics)
Modal
Continuous wavelet
Time–frequency representation
Frequency domain
Mathematics
Subjects
Details
- Language :
- English
- ISSN :
- 23813652
- Database :
- OpenAIRE
- Journal :
- IndraStra Global
- Accession number :
- edsair.doi.dedup.....114ea67b9c78f40e4edddfc4fa9845bd
- Full Text :
- https://doi.org/10.1016/j.oceaneng.2008.07.004